Based on Dongpang Mine of Jizhong Energy Corporation, S2704 working face with large mining height, complicated mining conditions, the roof of the mechanics analysis model was constructed, the mine pressure appearance law in the process of working face mining was measured and analyzed, the result showed that two-way inclined working face pressure had obvious periodicity, with the working face advance, the vertical stress distribution with appearance of the lower big, then middle, upper small, which revealed the regularity of mine pressure appearance under certain conditions.